Patent Model - Improvement in Wipers for Blackboards

Maker and role
Philander Perry, Patentee
Philander Perry, Assignee
Ephraim Bender, Assignee
Production date
Sep 30 1862
See full details

Object detail

Wood, velvet
2 x 8 x 4 1/4" (5.1 x 20.3 x 10.8cm)
Perry states in his patent that "blackboard rubbers now in use are simply oblong blocks covered with sheepskin, the wool outside, or with buckskin. This leather covering soon becomes charged with chalk-dust so that after a short time of use instead of fairly cleaning the board it simply covers it with a gray coat..."

His improvement consists of "the combination of the wooden blocks A and D with a covering of cloth, the space between them being filled with a stuffing composed of prepared shavings and clippings of cloth, with or without pieces of sponge..." (Patent Number 36,589)
Object number
Currently on display?


My shortlist

Object type

Explore other objects by color

Public comments

Be the first to comment on this object record.

Google reCaptchaThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.